RF PLL Free-run Frequency Check

Procedure :

1.Connect frequency counter to test point TP (XPCK) with lead wire.

frequency counter

BD board
TP (XPCK)	+
	–

2.Turn I/u button on.

3.Put the disc (YEDS-18) in to play the number five track. Confirm that reading on frequency counter is 4.3218MHz.

Disc Sensor Adjustment

Perform this adjustment after completing all adjustments of the mechanism section.

If not performed accurately, the presence of the disc may not be detected properly.

Connection 1:

oscilloscope

CN506 of MAIN board
T1: Pin 1 (T. SENS 1)
T2: Pin 2 (T. SENS 2)	+
D0: Pin 4 (D. SENS)	+
1 k Ω	–

Procedure:

1.Connect the oscilloscope to Pins 1, 2, and 4 of CN506 of the MAIN board. Also connect a 1 kΩ resistor to Pin 4 at the

same time. (Connection 1)

2.Check that no discs are loaded in the unit, and press the I/u button while pressing the [INPUT] button.

3.The rotary table will continue rotating in the clockwise direc- tion.

4.Observe the waveform at that time on the oscilloscope.

5.Loosen the screw securing the LUMINOUS board slightly.

6.Slide the LUMINOUS board to the left and right so that the peak of the D0 waveform is at the center between the descend- ing point of the T1 waveform and ascending point of the T2 waveform. (Waveform 1) After adjusting, apply locking com- pound.

LUMINOUS board

Waveform 1:

A B

Connection 2:

CN506 of MAIN board T1: Pin 1 (T. SENS 1) T2: Pin 2 (T. SENS 2) D0: Pin 4 (D. SENS)

Waveform 2

X Y

oscilloscope

–

7.Disconnect the resistor connected to Pin 4 of CN506 of the MAIN board. (Connection 2)

8.Observe the waveform on the oscilloscope. (Waveform 2)

9.Adjust RV501 of the MAIN board so that the waveform on the oscilloscope satisfies the following adjustment value.

10.After the adjustment, load a disc only in slit 1, close the front cover, and press the I/u button to turn off the power.

11.Press the I/u button while pressing the [PUSHÊENTER] button to turn on the power.

12.If the rotary table makes round, and “YES” is displayed on the fluorescent indicator tube after it stops, it means that the ad- justment has been performed properly.

Adjustment value:

At the shoulder part of waveform D1, T1 becomes H and T2 be- comes L, and at the same time, the Y width must not be smaller than 1/4 of the Z width.

In order to satisfy this value more easily, adjust so that X=Y ap- proximately and observe the deviation of the waveform.

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CDP-CX220 specifications

The Sony Ericsson CDP-CX220 is a notable model within the realm of compact disc players, designed to blend advanced technology with user-friendly features. Launched in the late 90s, this device showcases Sony's commitment to delivering high-quality audio experiences through its innovative engineering and design.

One of the standout features of the CDP-CX220 is its impressive capacity. This compact disc player can hold up to 200 CDs, thanks to its innovative carousel system. This allows users to enjoy extended listening sessions without the need to change discs frequently, making it particularly appealing for audiophiles and casual listeners alike. The unit is designed to be both functional and space-efficient, fitting seamlessly into various media setups.

The CDP-CX220 employs Sony’s advanced Digital Sound Processing (DSP) technology, which enhances sound quality by providing clarity and depth to audio playback. This feature is particularly advantageous for those who appreciate detailed soundscapes, as it minimizes distortion and optimizes audio fidelity.

In terms of connectivity, the CDP-CX220 comes equipped with multiple outputs, including digital coaxial and optical connections. This provides users with the flexibility to integrate the player into a wider home audio setup, allowing for high-quality sound transfers to amplifiers and surround sound systems. Additionally, the CDP-CX220 supports standard RCA outputs for connecting to traditional stereo systems.

Navigating through stored CDs is made easy with the CDP-CX220’s user-friendly interface. It includes a remote control, allowing users to access playlists and selections from a distance. The intuitive display provides clear information about track numbers and playback status, ensuring a smooth and enjoyable listening experience.

Furthermore, the player incorporates various playback modes, including shuffle and repeat functions, enabling personalized listening experiences. Users can tailor their listening sessions to suit their moods, whether they desire randomness or continuity in their music selection.

Overall, the Sony Ericsson CDP-CX220 exemplifies a fusion of technology and practicality, designed to cater to the diverse needs of music lovers. Its impressive capacity, superior sound processing, versatility in connectivity, and user-friendly features solidify its reputation as a robust and reliable compact disc player that has stood the test of time.

Sony Ericsson CDP-CX220 service manual RF PLL Free-run Frequency Check, Disc Sensor Adjustment

Models: CDP-CX220